<?php
	//echo "in php";
	
	$username=$_GET['username'];
	
	if($username=="")
	  {
		  echo "Please provide Username";
	  }
	else if ($username !='' && (!ereg('^[A-Za-z0-9]',$username)))
	  {
		  echo "Please avoid special chatacters in username";
		  
	  }
	/*else
	  {
		  echo "OK";
	  }*/

?>